[TB] Replace null with empty string for filenames in TorrentClient

Not sure if its better to do this or allow null value to db, but i had this originally and it worked so i think im better off leaving it for now, but idk.

Also got fix for incorrect log

server/RdtClient.Service/Services/TorrentClients/AllDebridTorrentClient.cs

@@ -263,16 +263,16 @@ public class AllDebridTorrentClient(ILogger<AllDebridTorrentClient> logger, IHtt
 
         return links.Select(m => m.LinkUrl.ToString()).ToList();
     }
-    public Task<String?> GetFileName(String downloadUrl)
+    public Task<String> GetFileName(String downloadUrl)
     {
         if (String.IsNullOrWhiteSpace(downloadUrl))
         {
-            return Task.FromResult<String?>(null);
+            return Task.FromResult("");
         }
 
         var uri = new Uri(downloadUrl);
 
-        return Task.FromResult<String?>(HttpUtility.UrlDecode(uri.Segments.Last()));
+        return Task.FromResult(HttpUtility.UrlDecode(uri.Segments.Last()));
     }
 
     private async Task<TorrentClientTorrent> GetInfo(String torrentId)

server/RdtClient.Service/Services/TorrentClients/ITorrentClient.cs

@@ -15,5 +15,5 @@ public interface ITorrentClient
     Task<String> Unrestrict(String link);
     Task<Torrent> UpdateData(Torrent torrent, TorrentClientTorrent? torrentClientTorrent);
     Task<IList<String>?> GetDownloadLinks(Torrent torrent);
-    Task<String?> GetFileName(String downloadUrl);
+    Task<String> GetFileName(String downloadUrl);
 }

server/RdtClient.Service/Services/TorrentClients/PremiumizeTorrentClient.cs

@@ -242,16 +242,16 @@ public class PremiumizeTorrentClient(ILogger<PremiumizeTorrentClient> logger, IH
         return downloadLinks;
     }
 
-    public Task<String?> GetFileName(String downloadUrl)
+    public Task<String> GetFileName(String downloadUrl)
     {
         if (String.IsNullOrWhiteSpace(downloadUrl))
         {
-            return Task.FromResult<String?>(null);
+            return Task.FromResult("");
         }
 
         var uri = new Uri(downloadUrl);
 
-        return Task.FromResult<String?>(HttpUtility.UrlDecode(uri.Segments.Last()));
+        return Task.FromResult(HttpUtility.UrlDecode(uri.Segments.Last()));
     }
 
     private async Task<TorrentClientTorrent> GetInfo(String id)

server/RdtClient.Service/Services/TorrentClients/RealDebridTorrentClient.cs

@@ -396,16 +396,16 @@ public class RealDebridTorrentClient(ILogger<RealDebridTorrentClient> logger, IH
         return null;
     }
 
-    public Task<String?> GetFileName(String downloadUrl)
+    public Task<String> GetFileName(String downloadUrl)
     {
         if (String.IsNullOrWhiteSpace(downloadUrl))
         {
-            return Task.FromResult<String?>(null);
+            return Task.FromResult("");
         }
 
         var uri = new Uri(downloadUrl);
 
-        return Task.FromResult<String?>(HttpUtility.UrlDecode(uri.Segments.Last()));
+        return Task.FromResult(HttpUtility.UrlDecode(uri.Segments.Last()));
     }
 
     private DateTimeOffset? ChangeTimeZone(DateTimeOffset? dateTimeOffset)

server/RdtClient.Service/Services/TorrentClients/TorBoxTorrentClient.cs

@@ -302,11 +302,11 @@ public class TorBoxTorrentClient(ILogger<TorBoxTorrentClient> logger, IHttpClien
         return files;
     }
 
-    public async Task<String?> GetFileName(String downloadUrl)
+    public async Task<String> GetFileName(String downloadUrl)
     {
         if (String.IsNullOrWhiteSpace(downloadUrl))
         {
-            return null;
+            return "";
         }
 
         var uri = new Uri(downloadUrl);

server/RdtClient.Service/Services/Torrents.cs

@@ -374,7 +374,7 @@ public class Torrents(
     {
         var download = await downloads.GetById(downloadId) ?? throw new($"Download with ID {downloadId} not found");
 
-        Log($"Unrestricting link", download, download.Torrent);
+        Log($"Retrieving filename for", download, download.Torrent);
 
         var fileName = await TorrentClient.GetFileName(download.Link!);